SudokuHard

Hard Sudoku — Puzzle 131

9172
1724
429
489
179
638
641
342

How to play

Fill every row, every column and every 3 by 3 box with the numbers 1 to 9, using each number once.

This puzzle has 26 given numbers and exactly one solution, so it can always be finished by reasoning alone.

286754193
354891672
917263548
563478219
428319756
179526384
641937825
792685431
835142967